A circumferential positioning machining tool

Abstract

This application relates to a circumferential positioning machining fixture, which includes a fixed plate, a base, and a clamping assembly. The base is fixedly mounted on the fixed plate, and the clamping assembly is fixedly mounted on the base. The base has a positioning hole for rotating and mounting the workpiece. The workpiece is installed in the positioning hole and is secured by the clamping assembly to ensure that the workpiece will not shift or vibrate during machining. This application uses two opposing clamping screws to clamp the edge of the workpiece from the same side. This design makes it more convenient to adjust the circumferential position of the workpiece. During operation, simply loosening one clamping screw allows for flexible movement of the workpiece. After adjusting to the appropriate position, it can be clamped again, achieving precise adjustment and fixation of the workpiece in the circumferential direction.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing and discloses a circumferential positioning machining fixture. Background Technology

[0002] In modern machining, especially in the milling of small workpieces, precise angle control is one of the key factors in ensuring machining quality. Traditional machining methods usually rely on the operator's experience and manual adjustments, which is not only inefficient but also prone to errors, making it difficult to guarantee machining accuracy. Especially in the machining of small cylindrical parts, due to the small size of the workpiece, traditional clamping and positioning methods are often insufficient to meet the high-precision machining requirements.

[0003] Technical problems with existing technologies: Existing machining fixtures typically employ simple clamping devices, which, while able to fix the workpiece to a certain extent, often lack an effective adjustment mechanism for circumferential positioning, making it difficult to accurately control the circumferential position of the workpiece. Furthermore, when existing fixtures are mounted on machine tools, installation errors can cause the workpiece's positioning reference to shift, further affecting machining accuracy.

[0004] In response to the aforementioned prior art, and to address the problem of difficulty in precisely controlling the circumferential position of the workpiece, the applicant has designed a circumferential positioning machining fixture. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a circumferential positioning machining fixture.

[0006] This application provides a technical solution that adopts the following approach:

[0007] A circumferential positioning machining fixture, characterized in that it includes a fixed plate, a base, and a clamping assembly; the base is fixedly mounted on the fixed plate, and the clamping assembly is fixedly mounted on the base; the base has a positioning hole for rotatably mounting a workpiece; the clamping assembly includes connecting plates and clamping screws, there are two connecting plates, the two connecting plates are arranged in parallel and respectively mounted on the base; there are two clamping screws, the two clamping screws pass through and are rotatably mounted on the two connecting plates, and the ends of the two clamping screws are opposite to each other; the two clamping screws are located on the same side of the positioning hole for clamping and fixing the edge of the workpiece.

[0008] By adopting the above technical solution, the workpiece is placed in the positioning hole, and its circumferential position is adjusted by rotating around the axis of the positioning hole. Two opposing clamping screws clamp the edge of the workpiece from the same side, thereby fixing the circumferential position of the workpiece. This design makes adjusting the circumferential position of the workpiece more convenient and stable. During operation, the position of one clamping screw is fixed as a positioning position and does not move arbitrarily. Simply loosening one clamping screw allows for easy picking and placing of the workpiece. After the workpiece is placed in the positioning hole, the edge of the workpiece first abuts against the positioning clamping screw, and then the other clamping screw is tightened to fix the edge of the workpiece. This achieves precise positioning and fixation of the workpiece in the circumferential direction, effectively reducing processing errors and improving processing accuracy and efficiency. As for the positioning clamping screw, its position can be adjusted. According to actual operating experience, there will be a certain error in the front and back positions after each disassembly and installation of the fixture. After the fixture is installed on the processing equipment, the installation error can be eliminated by adjusting the position of the clamping screw, ensuring accuracy.

[0009] Preferably, the base includes a base plate and a positioning block, the positioning block is fixed on the base plate, and the positioning hole is formed on the positioning block.

[0010] By adopting the above technical solution, the positioning block is independently set and fixed on the substrate, making the processing and maintenance of the positioning hole more convenient. If the positioning block is worn or damaged, only the positioning block needs to be replaced, without replacing the entire base, thus reducing the maintenance cost of the tooling.

[0011] Preferably, there are two positioning blocks and two substrates, and the two positioning blocks are respectively installed on the side of the two substrates that are close to each other; a semi-cylindrical groove is opened on the side of the two positioning blocks that are close to each other, and the grooves on the two positioning blocks are combined to form the positioning hole; there is no contact between the bases and between the positioning hole and the positioning block to form a process seam.

[0012] By adopting the above technical solution, the positioning hole formed by the combination of two semi-cylindrical grooves is adapted to the outer contour of the cylindrical workpiece, enabling precise positioning of the cylindrical workpiece and effectively improving the positioning accuracy. The process seam serves multiple purposes. On the one hand, during processing, the workpiece and tooling are subjected to various forces. The process seam can alleviate stress concentration, preventing tooling deformation or damage due to excessive stress and extending the tooling's service life. On the other hand, the process seam allows for a certain degree of thermal expansion and contraction, reducing the impact of temperature changes on tooling accuracy and ensuring that the tooling maintains high positioning accuracy under different working environments.

[0013] Preferably, the positioning hole penetrates the positioning block; a mounting groove for mounting the positioning block is provided through the substrate.

[0014] By adopting the above technical solution, the positioning hole penetrates the positioning block, making it more convenient and faster to place and remove workpieces. Workpieces can be directly placed or removed from one end of the positioning block without complex operations, improving work efficiency. Simultaneously, the mounting groove on the base plate facilitates the installation and positioning of the positioning block. The size and shape of the mounting groove match the positioning block, ensuring the accuracy and stability of the positioning block during installation, thereby further guaranteeing the positioning accuracy of the workpiece.

[0015] Preferably, the two substrates are a first substrate and a second substrate, and both connecting plates are mounted on the first substrate; a fixing handle is provided at one end of the second substrate, and a slot is provided on the fixing plate. The slot is adapted to the contour of the second substrate, and the second substrate is disposed through the slot. The fixing handle is located on the side of the fixing plate away from the second substrate.

[0016] By adopting the above technical solution, the second base plate mates with the fixing plate through a slot, and combined with the design of the fixing handle, a stable and reliable method is provided for connecting the tooling to the machine tool. The fixing handle can be easily connected to the corresponding part of the machine tool, allowing the tooling to be firmly fixed on the machine tool. During the machining process, this connection method can effectively reduce the shaking and displacement of the tooling, ensuring the stability of the workpiece during machining, thereby improving machining accuracy.

[0017] Preferably, the fixing plate is provided with a fixing pin, the fixing pin is provided through the slot, and the second base plate is provided with a plug hole for plugging and fixing with the fixing pin.

[0018] By adopting the above technical solution, the cooperation between the fixing pin and the insertion hole further enhances the connection strength and stability between the second substrate and the fixing plate. The fixing pin, inserted into the insertion hole of the second substrate, effectively prevents the second substrate from rotating or shifting within the slot, ensuring the stability of the overall tooling structure.

[0019] Preferably, the second substrate and the fixing handle are integrally formed.

[0020] By adopting the above technical solution, the one-piece molded structure makes the connection between the second substrate and the fixing handle more secure and reliable, avoiding the impact on the normal use of the tooling due to loosening or breakage of the connection parts during long-term use.

[0021] Preferably, the two connecting plates are fixedly mounted on the first base plate by bolts, and anti-loosening washers are provided on the bolts.

[0022] By adopting the above technical solution, the anti-loosening washer undergoes elastic deformation when the bolt is tightened, forming a continuous preload. During the processing, the tooling is subjected to various vibrations and impacts. The presence of the anti-loosening washer can effectively resist these external forces, prevent the bolt from loosening, and ensure that the connection between the connecting plate and the first base plate remains stable at all times.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The workpiece is placed in the positioning hole. The workpiece rotates around the axis of the positioning hole to adjust its circumferential position. Two opposing clamping screws clamp the workpiece edge from the same side, thus fixing the workpiece's circumferential position. This design makes adjusting the workpiece's circumferential position more convenient and stable. During operation, one clamping screw is fixed in position for positioning and does not move arbitrarily. Simply loosening one clamping screw allows for easy placement and removal of the workpiece. After the workpiece is placed in the positioning hole, its edge first abuts against the positioning clamping screw, and then the other clamping screw is tightened to fix the workpiece edge. This achieves precise circumferential positioning and fixation of the workpiece, effectively reducing machining errors and improving machining accuracy and efficiency. The positioning clamping screws can be adjusted in position. Based on practical experience, there will be some error in the front and back positions after each disassembly and installation of the fixture. After the fixture is installed on the processing equipment, adjusting the position of the clamping screws can eliminate installation errors and ensure accuracy.

[0025] 2. By independently setting and fixing the positioning blocks to the base plate, the machining and maintenance of the positioning holes become more convenient. If the positioning blocks are worn or damaged, only the positioning blocks need to be replaced, without replacing the entire base, thus reducing the maintenance cost of the tooling.

[0026] 3. The engagement of the retaining pin and the insertion hole further enhances the connection strength and stability between the second substrate and the fixing plate. The retaining pin, inserted into the insertion hole of the second substrate, effectively prevents the second substrate from rotating or shifting within the slot, ensuring the overall stability of the tooling structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0029] Figure 3 yes Figure 1 Cross-sectional view at point AA.

[0030] Reference numerals: 1. Fixing plate; 2. Base; 21. First base plate; 22. Second base plate; 23. Positioning block; 3. Clamping assembly; 31. Connecting plate; 32. Clamping screw; 4. Positioning hole; 5. Anti-loosening washer; 6. Slot; 7. Fixing handle; 8. Fixing pin; 9. Insertion hole; 10. Mounting groove. Detailed Implementation

[0031] This application discloses a circumferential positioning machining fixture.

[0032] A circumferential positioning machining fixture, referring to Figure 1 It includes a fixed plate 1, a base 2 and a clamping assembly 3; the base 2 is fixedly installed on the fixed plate 1, and the clamping assembly 3 is fixedly installed on the base 2. The base 2 has a positioning hole 4 for rotating and installing the workpiece. The workpiece is installed in the positioning hole 4 and is fixed by the clamping assembly 3 to ensure that the workpiece will not be displaced or vibrated during the processing.

[0033] Specifically, the clamping assembly 3 includes connecting plates 31 and clamping screws 32. There are two connecting plates 31, which are arranged in parallel and fixedly installed on the base 2. The two connecting plates 31 are located on both sides of the positioning hole 4. There are two clamping screws 32, which are respectively installed through and rotatably on the two connecting plates 31. The two clamping screws 32 are located on the same side of the positioning hole 4 for clamping and fixing the workpiece, and the ends of the two clamping screws 32 are opposite to each other.

[0034] Furthermore, each of the two clamping screws 32 is equipped with a nut. The two nuts are located on the side of the two connecting plates 31 furthest from the positioning hole 4 and are rotatably mounted on the clamping screws 32. When clamping a workpiece, rotating the two clamping screws 32 utilizes the screw feed to gradually bring the ends of the two screws closer together and clamp the workpiece. Simultaneously, adjusting the position of the nuts and tightening them towards the connecting plate 31, the friction between the nuts and the connecting plate 31 fixes the position of the clamping screws 32, preventing them from rotating due to vibration or other factors during processing. This ensures the clamping stability of the workpiece, preventing displacement or vibration during processing and achieving precise positioning and reliable fixation of the workpiece.

[0035] Furthermore, both connecting plates 31 are fixedly mounted on the base 2 with bolts, and anti-loosening washers 5 are provided on the bolts. When the bolts are tightened, the anti-loosening washers 5 are compressed, producing elastic deformation, thereby forming a continuous preload at the bolt connection. This preload can effectively resist vibrations and impacts generated during processing, prevent bolt loosening, and ensure a stable connection between the connecting plates 31 and the base 2.

[0036] Reference Figure 2 and Figure 3Specifically, the base 2 includes a first substrate 21 and a second substrate 22. The first substrate 21 is integrally formed with the fixing plate 1, and two connecting plates 31 are bolted to the first substrate 21. The fixing plate 1 has a slot 6 that matches the contour of the second substrate 22, and the second substrate 22 passes through the slot 6 and is located on the side of the fixing plate 1 closer to the first substrate 21. One end of the second substrate 22 is provided with a fixing handle 7, which is integrally formed with the second substrate 22, and the fixing handle 7 is located on the side of the fixing plate 1 away from the second substrate 22.

[0037] Furthermore, a fixing pin 8 is provided through the slot 6, and the portion of the second substrate 22 inserted into the slot 6 has an insertion hole 9. The fixing pin 8 is provided through the insertion hole 9 to achieve relative fixation between the second substrate 22 and the fixing plate 1.

[0038] Furthermore, the fixing handle 7 is a rectangular strip, used for fixing to the machine tool. When in use, the fixing handle 7 is fixed to the machine tool, so that the entire fixture is connected and fixed to the machine tool, ensuring that the fixture can be stably fixed to the machine tool during the machining of the workpiece, thus guaranteeing the machining accuracy and quality of the workpiece.

[0039] Furthermore, the base 2 also includes positioning blocks 23, which are cylindrical. There are two positioning blocks 23, which are respectively installed on the side of the first substrate 21 and the second substrate 22 that are close to each other. The side of the first substrate 21 and the second substrate 22 that are close to each other is respectively provided with semi-cylindrical grooves. The first substrate 21 and the second substrate 22 are combined to form a mounting groove 10, and the two positioning blocks 23 are fixedly installed in the mounting groove 10.

[0040] Furthermore, semi-cylindrical grooves are respectively opened on the side of the two positioning blocks 23 that are close to each other, and the two positioning blocks 23 are combined to form the above-mentioned positioning hole 4; the first substrate 21 and the second substrate 22, and the two positioning blocks 23 do not contact each other to form a process seam.

[0041] The implementation principle of the application embodiment is as follows: First, the workpiece is placed in the positioning hole 4 formed by the combination of two positioning blocks 23 to achieve preliminary positioning of the workpiece. The positioning blocks 23 are respectively installed in the mounting groove 10 on the side of the first base plate 21 and the second base plate 22 that are close to each other. The first base plate 21 is integrally formed with the fixing plate 1, and the second base plate 22 is fixed to the fixing plate 1 through the slot 6 and the fixing pin 8, which ensures the stability of the base 2 structure and the accuracy of the position of the positioning blocks 23. Then, by rotating the two clamping screws 32, the feed of the screws makes the ends of the two screws gradually approach and clamp the workpiece. At the same time, the position of the nut is adjusted and tightened toward the connecting plate 31. The friction between the nut and the connecting plate 31 can fix the position of the clamping screws 32 and prevent them from rotating due to vibration or other factors during processing, thereby ensuring reliable clamping of the workpiece and ensuring that the workpiece will not be displaced or vibrated during processing. The two connecting plates 31 are fixed to the first base plate 21 by bolts, and anti-loosening washers 5 are provided on the bolts. When the bolts are tightened, the anti-loosening washer 5 undergoes elastic deformation, forming a continuous preload at the bolt connection to resist vibrations and impacts generated during processing, prevent the bolts from loosening, ensure a stable connection between the connecting plate 31 and the base 2, and thus ensure the stable clamping of the workpiece by the clamping assembly 3.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A circumferential positioning machining tool characterized by, The assembly includes a fixing plate (1), a base (2), and a clamping assembly (3); the base (2) is fixedly mounted on the fixing plate (1), and the clamping assembly (3) is fixedly mounted on the base (2); the base (2) has a positioning hole (4) for rotating and mounting the workpiece; the clamping assembly (3) includes a connecting plate (31) and a clamping screw (32), there are two connecting plates (31), the two connecting plates (31) are arranged in parallel and respectively mounted on the base (2); there are two clamping screws (32), the two clamping screws (32) pass through and are rotatably mounted on the two connecting plates (31), and the ends of the two clamping screws (32) are opposite to each other; the two clamping screws (32) are located on the same side of the positioning hole (4) for clamping and fixing the edge of the workpiece.

2. The circumferential positioning machining tool according to claim 1, wherein, The base (2) includes a base plate and a positioning block (23). The positioning block (23) is fixed on the base plate, and the positioning hole (4) is formed on the positioning block (23).

3. The circumferential positioning machining tool according to claim 2, wherein, Both the positioning block (23) and the substrate are configured in pairs, and the two positioning blocks (23) are respectively installed on the side of the two substrates that are close to each other; a semi-cylindrical groove is opened on the side of the two positioning blocks (23) that are close to each other, and the grooves on the two positioning blocks (23) are combined to form the positioning hole (4); the bases do not contact each other and the positioning hole (4) and the positioning block (23) do not form a process seam.

4. The circumferential positioning machining tool of claim 3, wherein, The positioning hole (4) penetrates the positioning block (23); the substrate is provided with a mounting groove (10) for mounting the positioning block (23).

5. The circumferential positioning machining tool of claim 3, wherein, The two substrates are a first substrate (21) and a second substrate (22), and two connecting plates (31) are mounted on the first substrate (21). A fixing handle (7) is provided at one end of the second substrate (22). A slot (6) is provided on the fixing plate (1). The slot (6) is adapted to the outline of the second substrate (22). The second substrate (22) passes through the slot (6). The fixing handle (7) is located on the side of the fixing plate (1) away from the second substrate (22).

6. A circumferential positioning machining tool according to claim 5, wherein The fixing plate (1) is provided with a fixing pin (8), which passes through the slot (6). The second base plate (22) is provided with a plug hole (9) for plugging and fixing with the fixing pin (8).

7. The circumferential positioning machining tool of claim 5, wherein, The second substrate (22) and the fixing handle (7) are integrally formed.

8. The circumferential positioning machining tool of claim 5, wherein, Two connecting plates (31) are fixedly mounted on the first base plate (21) by bolts, and anti-loosening washers (5) are provided on the bolts.

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